Guitar Hero and Rock Band. Refer to the previous exercise.
(a) How would the result that you reported in part (c) change if only 25% of the respondents said that they did not currently play a musical instrument?
(b) Do the same calculations if the percent was 75%.
(c) The main conclusion of the survey that appeared in many news stories was that 67% of players of Guitar Hero and Rock Band who do not currently play a musical instrument said that they are likely to begin playing a real musical instrument in the next two years. What can you conclude about the effect of the three scenarios (part (b) in the previous exercise and parts (a) and (b) in this exercise) on the margin of error for the main result?